下列哪些指标更能准确反映血容量() ["A.尿量","B.心率","C.中心静脉压","D.心电图","E.血压"]
全麻下腹腔镜胆囊切除手术后,其取合适的体位是() ["A.半卧位","B.床头抬高15~30cm","C.去枕平卧头侧位","D.侧卧位","E.床尾垫高20cm"]
轮廓乳头叶状乳头丝状乳头菌状乳头 ["数目最多,舌尖部较多,体积较小,略呈锥体状","体积最大,约10个左右,沿界沟的前方排列成一行","位于舌侧缘的后部,在人类仅有5~8条平行的皱襞","呈卵圆形,为味觉感受器","数目较少,色较红,呈蕈状,顶端圆形"]
继发性牙本质是前期牙本质是修复性牙本质是小球间牙本质是 ["在成牙本质细胞和矿化牙本质之间是一层未钙化的牙本质","牙本质钙质小球之间遗留的未钙化间质","在冠部靠近釉质和根部靠近牙骨质最先形成的牙本质","牙齿发育完成后形成的牙本质","釉质表而因磨损、酸蚀、龋病等而遭受破坏时,部分成牙本质细胞继续形成的牙本质"]
釉柱晶体的宽约釉柱晶体的厚约釉柱晶体的长度约 ["100~140nm","40~90nm","5~15nm","20~30nm","160~1000nm"]
龈牙组纤维根间组纤维牙骨膜组纤维牙槽龈组纤维